CVE-2026-6388

critical · 9.1

A flaw was found in ArgoCD Image Updater. This vulnerability allows an attacker, with permissions to create or modify an ImageUpdater resource in a multi-tenant environment, to bypass namespace boundaries. By exploiting insufficient validation, the attacker can trigger unauthorized image updates on applications managed by other tenants. This leads to cross-namespace privilege escalation, impacting application integrity through unauthorized application updates.

9.1

CVSS

0.4%

EPSS (exploit prob.)

29th

EPSS percentile

2026-04-15

Published

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

Weaknesses

CWE-1220

References

https://access.redhat.com/security/cve/CVE-2026-6388
https://bugzilla.redhat.com/show_bug.cgi?id=2458766
https://access.redhat.com/security/cve/CVE-2026-6388
https://bugzilla.redhat.com/show_bug.cgi?id=2458766
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6388.json

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-6388